Pipe-wrench.



P. T. GREENWOOD.-

PIPE WRBNGH.A

APPLICATION FILED AUG. 12, 1909.

QQQ, Patented Aug.2,1910.`

i llll' Bridgeport, in the the combination and arrangement Wiseis formedintegral with said head. EX-

tendlng through this head trom top to the lbottom thereof is atransverse opening` a lijvhichare provided with ribs 8 that fit with-:m'the Ways 5, so that it ,will be clear that Ving into these Ways`10.

`same time he capable ol a lengthwise play i to be explained.

straatnamen.

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1' 'o all whom it may concern:

Be it known that l, lPnncY 'lh Gnnnnivoon, a, citizen of theUnited-States, residin at county oit Fairfield and State of Connecticut,have invented certain new and useful improvements in Pipe- Wrenches; andl do hereby declare the tollovving to be afull, clear, and enactdescription oit the invention, such as Will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to pipe wrenches, and as for its object to providea simple and. eflicient device ot this description which may be readilyadjusted and operated, and with these ends in view my invention consistsin of parts hereinafter fully set forth and 'then particularly pointedout in the claims which conclude this description.

In the accompanying drawing Figure 1 is a side elevation of my improvedWrench- Fig.2 is a plan v:iew---lligu 3 'is a section at the line w, au,of Fig'. 1-li`iez i a' detail plan View oi the stationary jaw, and Fig.5 a :liront elevation et the same.

Similar numerals olf reference denote like parts in the several ligeroshf the drawing'.

1 is the head or body portion oli' the wrench having formed integraltherewith a hand lcver"` 2, and 3 is a stationary which lilie- Withinthe sides of which are `formed guide Ways 5, and 6 is the movable jawwhich has formed on its rear a rack bar 'i' the sides oi said rack barwill be guided Within saidv Ways and Will be capable ot play.

-9 is an openingr cut throughtho head 1 from side to side, the sideWalls ot this openinghaving cut therein Ways 1 0 shown in dotted linesat Figs. 2 and a, small gates 11 being cut in one side of said head andlead- 12 is a Worm provided at opposite ends With short hubs 13 whichlatter are introduced through the gates l1 into the ways 10, so that theWorm may revolve and at the Within said Ways' for the purpose presentlyritpeeiication of Ztetters Patent.

application :filed .august la,

,any suitable position.

14 is a block Within the opening` 9 and `ltatenterll einen 191e.. ieee.einer ne. massa ated to adjust the position of the movable jaw withrespect te the stationary jaw, and the engagement oi the Worm with therack bar will be insured by the impact of the spring pressed block-let.By grasping the Worm and pulling the same back against the block 1li theWorm will thereby be disergaged from the rack bar and the latter may bereadily removed ii desired; also coarse adjustments of the movable jawmay be, eit-y t'ected by disengaging the Worm and rack har and thenmoving the latter bodily to 'lhc ribs tl on the raclrbar lia-vea slightplay Within the Ways so as to permit ot' a slight back-lash lon the partoli Athe movable jaw common in pipe `Wren cl les. l

llavi n p; thus described my invention what l claim as new and desire tosecure hylietters Patent is :M

1. In a pipe Wrench, in combination with the head, formed with astationary jaw, a rack bar at the rear end' of the :movable jaw', saidhead being provided fvvith a lateral opening' and further provided withgrooves or tracks at the opposite sides et said lateral opening, aWormlin engagement with said. rack-bar, retainingn hubs integral with.said worm and operating insaid grooves or tracks to allow said worm tobe moved toward or away from said rack-bar, a block slidingly mountedwithin said lateral opening' andhaving` its forward tace concave andconformably embracing said W'orn'i, and spring elements which actagainst the rear face of said bloelr, said spring elements seatingat oneend on the lrear face or' the block and at their opposite ends on therear end wall of the lateral opening, whereby said Worm is normallyforced in Aengagement formed 'with a stationary jaw, a movable jawcarried by the head, said head being provided with a lateral openingextending 4through the opposite sides of the head, the

l nions at its ends disposed in said guideways and adapted to have itstrunnions introduced throughsaid gateways, a block having its outer faceconcave to embrace said Worm, springs to engage the rear Yface of saidblock and therear wall ofsaid lateral opening, said springs beingadapted to force said block against said worm which latter normallyengages the movable aw.

3. A plpewrench, comprised of ahead, a stationary jaw, and 'a movablejaw, said head Ibeing provided with a lateral opening and With trackways in the opposite side walls vof said lateral opening, gateways inone side of the head which connect with said slideways, a Worm engaginjaw and having hubs, said hu s being adapted to be admitted to saidslideways through said gateways, a block contained in said lateralopening having its outer face concave to embrace the periphery` of thesaid worm and springs adapted to engage the block to hold same inengagement With the worm.

In testimon. whereof I aiix my signature in presence o two Witnesses.

PERCY. T. GREENWOOD.

Witnesses:

VF. W. SMITH, Jr., M. T. LONGDEN.

the movable

